Emerson EZH Series Instruction Manual Download

Page: 13 / 40

Carefully lift the upper actuator casing and lower
actuator casing assemblies (keys 11 and 5) and position

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Actuator Assembly Maintenance

NPS 1 through 3 / DN 25 through 80
(Refer to Figures 8 and 9)

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For EZH Series:

Loosen out the hex nuts (key 23)

and remove the washers (key 22) and the cap screws

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balance the upper actuator casing while removing the

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For EZHSO Series:

Remove protective

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the upper actuator casing (key 11) off the lower actuator

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diaphragm and O-rings for damage or wear and replace

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For EZH Series:

Remove the hex socket cap screws

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the disk holder assembly (key 30) and disk retainer

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For EZHSO Series:

Remove the hex

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Slide the sleeve (key 14) out of the lower actuator

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remove the O-ring and split rings and replace with

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and slide the sleeve into the lower actuator casing

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For EZH Series:

Place the disk holder (key 30)

and disk retainer (key 31) on the sleeve adaptor

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DQGKH[VRFNHWFDSVFUHZVNH\DQGWLJKWHQ

For EZHSO Series:

Place the disk holder assembly

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inlet plate (key 18) and the diaphragm (key 20) on the

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Note

When tightening fasteners arranged in a
circular pattern, alternate the tightening
of each fastener with the fastener directly
across from it using a “star” criss-cross

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torque is achieved. Each time around, when
all screws are tightened to the required
torque, the diaphragm will compress a little
until the plates are in direct, metal-to-metal,

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before this happens. Only then will the
applied torque on each screw remain at the
required value.

Carefully lift the lower actuator casing assembly (key 5)

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Make sure to match up

the alignment marks.

Secure with stud bolts and nuts

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For EZH Series:

Lightly lubricate the spring (key 13)

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Carefully place the upper actuator casing (key 11)